Adjustable helmet



FIG. 1 is a front-perspective view of a first embodiment of an adjustable helmet showing our new design;

FIG. 2 is a rear-perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a top view thereof;

FIG. 6 is a bottom view thereof;

FIG. 7 is a right-side view thereof, the left-side view (not shown) being a mirror image;

FIG. 8 is a front-perspective view of a second embodiment of an adjustable helmet;

FIG. 9 is a rear-perspective view thereof;

FIG. 10 is a front view thereof;

FIG. 11 is a rear view thereof;

FIG. 12 is a top view thereof;

FIG. 13 is a bottom view thereof;

FIG. 14 is a right-side view thereof, the left-side view (not shown) being a mirror image;

FIG. 15 is a front-perspective view of a third embodiment of an adjustable helmet;

FIG. 16 is a rear-perspective view thereof;

FIG. 17 is a front view thereof;

FIG. 18 is a rear view thereof;

FIG. 19 is a top view thereof;

FIG. 20 is a bottom view thereof; and,

FIG. 21 is a right-side view thereof, the left-side view (not shown) being a mirror image.

In FIGS. 8-14 no color forms a part of the claimed design. The shading illustrates contoured surfaces only. 

CLAIM The ornamental design for an adjustable helmet, as shown and described. 